คอมพิวเตอร์ช่วยสอนวิชาภาษาไทยสำหรับชั้นประถมศึกษาปีที่ 6 เรื่องคำพ้อง

Error message

• Notice: Undefined offset: 6207 in user_node_load() (line 3641 of /usr/local/www/apache24/data/lib-irpsru/modules/user/user.module).
• Notice: Trying to get property of non-object in user_node_load() (line 3641 of /usr/local/www/apache24/data/lib-irpsru/modules/user/user.module).
• Notice: Undefined offset: 6207 in user_node_load() (line 3642 of /usr/local/www/apache24/data/lib-irpsru/modules/user/user.module).
• Notice: Trying to get property of non-object in user_node_load() (line 3642 of /usr/local/www/apache24/data/lib-irpsru/modules/user/user.module).
• Notice: Undefined offset: 6207 in user_node_load() (line 3643 of /usr/local/www/apache24/data/lib-irpsru/modules/user/user.module).
• Notice: Trying to get property of non-object in user_node_load() (line 3643 of /usr/local/www/apache24/data/lib-irpsru/modules/user/user.module).